Peanuts serving size, cups to grams and 30 g of protein
Here a serving of roasted peanuts is counted as 1 oz (28 g), about 28 peanuts, with 166 calories and 6.9 g protein. One cup weighs 5.2 oz (146 g) and one tablespoon 9.1 g. For 30 g of protein you need 4.3 oz (123 g), about 3/4 cup, with 723 calories.
Serving sizes of roasted peanuts
Every household measure USDA weighs for this food, plus 1 oz and 100 g.
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup | 5.2 oz (146 g) | 857 calories | 35.6 g | 31 g | 72.5 g |
| 1 peanut | 1 g | 6 calories | 0.24 g | 0.21 g | 0.5 g |
| 1 oz | 1 oz (28 g) | 166 calories | 6.9 g | 6 g | 14.1 g |
| 100 g | 3.5 oz (100 g) | 587 calories | 24.4 g | 21.3 g | 49.7 g |
Cups to grams
USDA weighs 1 cup of roasted peanuts at 146 g. Smaller measures follow from it (1 cup = 16 tbsp = 48 tsp).
| Measure | Weight | Calories |
|---|---|---|
| 1 cup | 5.2 oz (146 g) | 857 calories |
| 3/4 cup | 3.9 oz (110 g) | 643 calories |
| 2/3 cup | 3.4 oz (97 g) | 571 calories |
| 1/2 cup | 2.6 oz (73 g) | 429 calories |
| 1/3 cup | 1.7 oz (49 g) | 286 calories |
| 1/4 cup | 1.3 oz (36 g) | 214 calories |
| 1 tbsp | 9.1 g | 54 calories |
| 1 tsp | 3 g | 18 calories |
Grams and ounces to cups
| Weight | Volume | Calories |
|---|---|---|
| 1 oz | 3.1 tbsp | 166 calories |
| 100 g (3.5 oz) | 2/3 cup | 587 calories |
| 1 lb (454 g) | 3 1/8 cups | 2663 calories |
What 3.5 oz (100 g) of peanuts looks like
3.5 oz (100 g) of roasted peanuts is 3.5 oz, or about 2/3 cup. It has 587 calories, 24.4 g protein, 21.3 g carbs and 49.7 g fat. One peanut weighs 1 g.
How much peanuts for 30 g of protein
There is 24.4 g of protein in 3.5 oz (100 g) of roasted peanuts. 30 g of protein takes 4.3 oz (123 g), about 3/4 cup, which comes with 723 calories.
| Protein | Weight | About | Calories |
|---|---|---|---|
| 20 g | 2.9 oz (82 g) | 1/2 cup | 482 calories |
| 30 g | 4.3 oz (123 g) | 3/4 cup | 723 calories |
Weights are for the form named above.
Keep exploring
Sources
Weights and nutrition: USDA FoodData Central, food portions and nutrients (FoodData Central, April 2026 release, accessed 2026-10-14)
- Peanuts (all types, dry-roasted): Peanuts, all types, dry-roasted, without salt, FDC ID 173806 (SR Legacy, published 2019-04-01)
- Kitchen measures (1 cup = 16 tbsp, 1 tbsp = 3 tsp): NDSU Extension, Ingredient Substitutions (FN198, J. Garden-Robinson, April 2013 edition). https://www.extension.purdue.edu/extmedia/HHS/HHS-784-W.pdf (accessed 2026-10-12)
How we calculate: each household measure is the gram weight USDA lists for this food. Calories and nutrients are the USDA values per 3.5 oz (100 g) scaled to that weight. 1 oz = 28.35 g and 1 lb = 453.6 g. Cup fractions are rounded to the nearest kitchen measure. A dash (—) means USDA reports no value. How we verify.